package com.atguigu.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.atguigu.eduservice.entity.EduSubject;
import com.atguigu.eduservice.entity.excel.SubjectData;
import com.atguigu.eduservice.service.EduSubjectService;
import com.atguigu.servicebase.handler.selfexception.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

/**
 * @ClassName SubjectExcelListener
 * @Description TODO
 * @Author lishan
 * @DATE 2021-10-14 23:45
 * @Version 1.0
 */
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    private EduSubjectService subjectService;

    public SubjectExcelListener() {
    }

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData == null){
            throw new GuliException(20001,"文件数据为空");
        }
        //一行一行读取，两个值第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        //没有相同一级分类，进行添加
        if(existOneSubject == null){
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            //一级分类名称
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }
        //拿到一级分类的id
        String pid = existOneSubject.getId();
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(),pid);
        if(existTwoSubject == null){
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            //二级分类名称
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }
    }

    //判断一级分类不能重复添加

    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name).eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }
    //判断二级分类不能重复添加

    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String parent_id){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name).eq("parent_id",parent_id);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
